package chapter05.Example08;

public class Example8 {
    public static void main(String[] args) {
        System.out.println("1、添加-----------");
        add();
        System.out.println("2、删除-----------");
        remove();
        System.out.println("3、修改-----------");
        alter();
    }
    public static void add(){
        StringBuffer sb = new StringBuffer();
        sb.append("itcast");
        System.out.println("append添加结果：" + sb);
        sb.insert(2,"123");
        System.out.println("insert添加结果：" + sb);
    }
    public static void remove(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.delete(1,5);
        System.out.println("删除指定位置结果：" + sb);
        sb.deleteCharAt(2);
        System.out.println("删除指定位置结果：" + sb);
        sb.delete(0,sb.length());
        System.out.println("清空缓冲区结果：" + sb);
    }
    public static void alter(){
        StringBuffer sb = new StringBuffer("itcastcn");
        sb.setCharAt(1,'p');
        System.out.println("修改指定位置字符结果：" + sb);
        sb.replace(1,3,"qq");
        System.out.println("替换制定位置字符（串）结果：" + sb);
        System.out.println("字符串反转结果：" + sb.reverse());

    }
}
